Video: Shocking new allegations against school principal

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EVERETT, Wash. - Prosecutors charged a 37-year-old private school principal from Arlington with third-degree child rape Thursday.

Now he faces more accusations.

Brown's ex-wife Casey says Brown has victimized more children – and she was one of them.

A few months shy of her 15th birthday, Casey started dating Brown and quickly the relationship became sexual.

He was 26.

"You never think at that age this is a wrong situation," she said. "He did ask me to keep it secret."

Eventually her family found out. They didn't feel good about it, but Casey was in love.

Five years later she and Brown got married.

But soon after, the relationship soured. Brown, then 32, was coaching wrestling at Concrete High School and Casey said he was spending time with cheerleaders and exchanging text messages.

"They were very inappropriate, very inappropriate communications to a minor," Casey said.

She suspected there was more and so did others who called police.

The Skagit County Sheriff's Office began investigating Brown, but didn't find enough evidence to charge him with a crime.

But whatever had happened, the Concrete School District didn't like it, and fired him.

Then Casey left him.

KING

Prosecutors have charged 37-year-old Mark Brown, a private school principal from Arlington, with third-degree child rape.

"I knew that the kind of man I was living with was pretty much, in my words, a pedophile," she said.

The last few years, Casey's tried forgetting about that time in her life.

She'd heard Brown had become a principal and thought about calling the school, but feared what he would do if she did.

It's a decision she'd like to take back.

"It angers me now even more that I didn't say anything and that another young girl is hurt and manipulated," Casey said.